This article will walk you through manually tracking your watch’s accuracy using a simple logging method. There are more precise methods, but they’re often expensive—like using a timegrapher or having your watch checked at a local shop. For most cases, a free app like WristLog is more than good enough.

If you own several watches, making sure you wear each one regularly is important. A good rotation system helps your watches stay in good condition and lets you enjoy your entire collection.

If you're a WristLog user, you're already familiar with the SPD (seconds per day) measurements displayed prominently next to each watch in your collection. But what do these numbers really tell us about our beloved timepieces, and how can we use this information to better understand and care for our watches? Let's dive into the fascinating world of mechanical watch accuracy.